Tag: Alumilite

What? You thought I had one of those stinking screaming mini-humans? Hah!

After I accidentally loaded my old vacuum pump with hydraulic oil instead of vacuum pump oil (oops!), it has never worked right again. Overheating. Loud banging noises. Foaming oil in the sight glass … It was bad. I needed a new one.

Thankfully, my buddies at Unicorn Tools had my back and got me a great price on a bigger, beefier vacuum pump. This one is getting pampered, I can tell you that much. They even sent along a spare container of the correct oil. Thank you guys so much! It takes about 3 seconds for this beast to pull all the air out of the vacuum chamber and it hums along like a champ under load. Love it!

Bask in its beauty.

And now that I have a working vacuum pump once again, I can cast things! Woo! Back to making swords!

Speaking of making swords …

Oh yes I did. Those of you familiar with my models will recognise Zaapiel, the exotic ring-sword inspired blade. The funky “spikes” sticking off of it are simply the little tabs that are created by the bubble traps in the mould. They get trimmed off before sanding and polishing happens.

Now this sword has some bubbles in it due to a resin issue I had, but the person it’s for said it looked cool as-is so we’re going with it. If you look closely, it looks like they’re some kind of magic spell firing down the length of the blade from the hand of some powerful magus.

ZAP!

That’s going to look really cool when it’s lit up. 🙂

The issue I was having with the resin was that I was using Alumilite Clear Slow and this resin tends to “gel” up after a few months of not being used. If this happens to you, do not panic and do not throw it away. All you need to do is put it in a water-tight container and give it a hot water bath for a few hours and it will be liquid again.

I portioned out about 500mL of resin, stuck it in a Ziploc container, sealed it, and popped it in a hot water bath. Every now and then I took it out, dried it off really thoroughly, opened it up, and stirred it until it was the liquid consistency I wanted. Now, you’ll notice I emphasised “dried it off really thoroughly” and that’s because resin is really, really finicky about moisture. Even a little dampness. So you can imagine what a drop or two of water in the mix would do to it. Be careful when you’re handling it.

So I re-liquefied it, vacuumed it, and still got bubbles in the finished product? Yep. That was my fault. You see, resin cures faster when it’s warm. Annnnd I forgot to cool the resin down after its hot water bath. I just went straight to the degassing and mixing and pouring. Whoops. I got a little too gung-ho and eager to try out this new sword mould. So I should have gotten twelve minutes of working time with the resin but I had slightly less than that because it was quite warm and the bubbles couldn’t escape as well before it hardened.

But we still ended up with a really cool result so I guess I’m learning stuff about mould-making and handling my materials effectively. Yay for learning!

Today, of course, I move on to the next stage of the build and that means wet-sanding the whooooole surface and getting a consistent overall clarity and shine. And that means I’m working from home today where I have running water. Yup. Picture me standing in the bathroom with my hands in the sink for … let’s not think about how many hours. That’s my work day today. LOL

As a little bonus on the end here, check out where we are on the raven statuette!

Sorry it’s a little hard to see its features on camera. In person, though, the black paint makes it easier for me to see imperfections and correct them. I noticed that the angle of its beak was a little off on its right side so I had to do some sanding and filing and a little carving to get it the way I wanted it. This piece will be getting some more smoothing, re-painting (to check again for errors), and sealing before I move on to the next part of the project.

As a bonus-bonus, here is the current state of “Thorn” (working name). It’s so comfortable to hold.

When can we expect to see it appear in my Etsy store? Well … that depends on when the person who asked for it gets back to me. LOL

Okay, time for me to stop yammering and go pick up some more sandpaper. It’s sleeting outside so uh … wish me luck. XD

So, the latest test I did, using a more resin-friendly dye, making sure the containers, tools, my hands, everything were as surgically clean and dry as possible, cured beautifully with no bubbles or delamination.

Except. It made a big ol’ wrinkly fissure in the back which tells me that it was somehow too cold while curing in the oven for three hours. Really? Really?

Alumilite is supposed to be a pretty user-friendly resin. I don’t want to see one of the “difficult” ones!

This is the fifth or sixth time I’ve done this trial and I’m thoroughly sick of looking at these little pink squares. At least the silicone is working nicely so let’s do it. Let’s make mould for Clariel!